Plug loads such as computer monitors, task lighting, coffeemakers, and vending machines are common in many buildings, especially office buildings, where use is intensive. The 20% increased receptacle power density whether consider from actual design or 0.A plug load is equipment powered by plugging into an ordinary AC receptacle.
#Ashrae 90.1 receptacle control full
The Proposed model shall include either a 20% increase in the receptacle power density for these spaces OR a 20% increase in the scheduled receptacle Equivalent Full Load Hours of Operation versus the Baseline model.– For Which Case we consider 0.75 Watts per square foot either BASE CASE or PROPOSED CASE? The receptacle power density modeled for these spaces shall be the greater of 0.75 Watts per square foot (8.1 Watts per square meter) or the design coincident peak receptacle power density (if known).So I have followed the LEED Interpretation-ID# 10462 but I need some clarification as mentioned below. Our proposed project does not have Automatic Receptacle Control as per ASHRAE 90.1 2010 section 8.4.2. O Detailed justification shall be provided supporting an alternate schedule. O 120% of the occupied hours of operation for the facility
#Ashrae 90.1 receptacle control manual
O The ASHRAE 90.1-2010 User’s Manual default schedule for office occupancy (2,920 Equivalent Full Load Hours per year)
Whole Building Energy Simulation may model a penalty in the Proposed model for the spaces where mandatory ASHRAE 90.1 receptacle controls are not implemented. But again you have the "plugged in" issue.įrankly, I am a bit surprised that this has not been addressed in Europe yet, as typically you are ahead of us related to these kinds of things.
There are even plug strips that are web enabled to allow scheduling and remote access. There are manufacturers addressing smaller systems, but they are typically an add on to a broader lighting control system. Then some AHJs may not accept any "plugged" in solution.ie occupancy controlled plug strips that are becoming more and more common. Many system furniture companies have systems for plug load occupancy control, but some are zoned into more than one work space, which is an issue. Larger projects can control circuits, and through careful electrical design, meet many of the requirements. Marcus is right, there are not a lot of tools for smaller projects. Enough soap box, but I think you get the idea that i support the concept and hope more tools are developed that helps us address this.
My insider at ASHRAE 90.1 committee feels they may have gone a little too far in this case, but it does address the underlining issue related to how big a part plug load can be in a high performance building. This goes to what I have called the next frontier, the control of plug loads.
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